Advanced lens design for bit-wise volumetric optical data storage

Yan Zhang, Tom D. Milster, Jai Soon Kim, Sang Ki Park

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


The storage capacity of a fluorescent bit-wise volumetric optical data storage system is limited by the inter-layer crosstalk and the maximum compensation range of spherical aberration induced by different layers inside the medium. Lens designs of far-field and near-field optical systems suitable for volumetric storage are presented. The maximum compensation range of each design is calculated. The storage densities of far-field and near-field confocal systems in terms of bits-in-2re derived based on the maximum compensation ranges and appropriate data layer spacings that induce a -30 dB maximum level of inter-layer crosstalk. It is shown that an optimized near-field system is able to achieve 1.65 Tb-in-2 data density.

Original languageEnglish (US)
Pages (from-to)4929-4936
Number of pages8
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Issue number7 B
StatePublished - Jul 2004


  • Crosstalk
  • Near-field optical storage
  • Signal-to-noise ratio
  • Volumetric data storage

ASJC Scopus subject areas

  • General Engineering
  • General Physics and Astronomy


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